<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Error</title>
</head>
<body>
    <h1>
        <span style="color: purple"> {{error}} </span>
    </h1>
    <div>
        <form action="/">
            <input type="submit" value="返回主页重新预测">
        </form>
    </div>
</body>
</html>